Jamila solves 20 x 5 by thinking about 10 tens. Explain her strategy.
3.NBT.3
3.OA.1
3.OA.7
From EngageNY.org of the New York State Education Department. Grade 3 Mathematics Module 3, Topic F, Lesson 20. Internet. Available from https://www.engageny.org/resource/grade-3-mathemat...; accessed 21/Oct/2015.
Pitanje 1
1.
Place parentheses in the equations to find the related facts. Then, solve.
Pitanje 2
2.
Place parentheses in the equations to find the related facts. Then, solve.